[1]刘愿,陈云明,梁思琦,等.陕北黄土丘陵区刺槐人工林土壤生态化学计量特征[J].水土保持研究,2019,26(04):43-49.
　LIU Yuan,CHEN Yunming,LIANG Siqi,et al.Soil Ecological Stoichiometry Characteristics of Robinia pseudoacacia Plantation in the Loess Hilly Region of Northern Shaanxi Province[J].Research of Soil and Water Conservation,2019,26(04):43-49.
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陕北黄土丘陵区刺槐人工林土壤生态化学计量特征

《水土保持研究》[ISSN:1005-3409/CN:61-1272/P] 卷: 26 期数: 2019年04期 页码: 43-49 栏目: 出版日期: 2019-06-11
Title:
Soil Ecological Stoichiometry Characteristics of Robinia pseudoacacia Plantation in the Loess Hilly Region of Northern Shaanxi Province
作者:
刘愿1, 陈云明1,2, 梁思琦1, 陈晨1
1. 西北农林科技大学 水土保持研究所 黄土高原土壤侵蚀与旱地农业国家重点实验室, 陕西 杨凌 712100;
2. 中国科学院 水利部 水土保持研究所, 陕西 杨凌 712100
Author(s):
LIU Yuan1, CHEN Yunming1,2, LIANG Siqi1, CHEN Chen1
1. State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Northwest A & F University, Yangling, Shaanxi 712100, China;
2. Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling, Shaanxi 712100, China
关键词:
土壤; 生态化学计量特征; 刺槐人工林; 黄土丘陵区
Keywords:
soil; characteristics of ecological stoichiometry; Robinia pseudoacacia plantation; loess hilly region
分类号:
S154.1
摘要:
为阐明陕北黄土丘陵区刺槐人工林土壤生态化学计量学特征，明确不同年限刺槐人工林土壤生态化学计量特征随土层深度的变化规律，采用野外调查与室内分析相结合的方法对研究区内9，17，30 a的刺槐人工林土壤C，N，P，K含量进行了测定，分析土壤化学计量特征及土层间的关系。结果表明：（1）随着刺槐年限的增加，土壤C，N含量增加且二者呈极显著的正相关关系，P含量先增加后减少，在生长年限后期需补充土壤P元素，K含量减少；（2）随土层深度的增加，土壤C，N含量均减少且与土层深度呈显著的负相关关系；P含量在所有土层中分布较均匀；K含量随着土层深度的增加而增加，与土层深度有显著的正相关关系；（3）土壤C：N，C：P，C：K，N：P，N：K和P：K均随年限的增加而增加；在0—100 cm土层内，C：N在8.52~8.96之间波动，C：P，C：K，N：P和N：K随土层深度的增加逐渐减少后趋于稳定。研究结果可为黄土丘陵区人工林生态系统养分受限元素判断和平衡调控机制提供依据。
Abstract:
To understand the characteristics of soil ecological stoichiometry and the relationships between soil depth and soil ecological stoichiometry in Robinia pseudoacacia plantation with 9 year, 17 year, 30 year age, respectively, in the loess hilly region, the field investigations and laboratory analyses were carried out to study the soil ecological stoichiometry characteristics and its relationship with soil depth. The results showed that: (1) with the growth of Robinia pseudoacacia plantation, the contents of the carbon (C), nitrogen (N) increased and a significant positive correlation between them existed; and the contents of the phosphorus (P) increased first and then decreased, and the soil P elements should be supplemented in the later growth years; The content of potassium (K) decreased with the growth of Robinia pseudoacacia plantation; (2) the contents of soil C and N decreased with the increase of soil depth and had a significant negative correlation with soil depth; P content evenly distributed throughout the soil, with little change in soil profile; K content increased with the increase of soil depth, and had a significant positive correlation with soil depth; (3) the soil C:N, C:P, C:K, N:P, N:K, and P:K all showed the increasing trend with the increase of years; in the 0—100 cm soil layer, the soil C:N had a narrow range of 8.52 to 8.96; C:P, C:K, N:P and N:K gradually decreased and then tended to be stable with the increase of soil depth. These results can provide the basis for the judgment of nutrient limiting elements and the balance regulation mechanism of plantation ecosystem in the loess hilly region.

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备注/Memo

收稿日期:2018-10-25;改回日期:2018-11-27。
基金项目:国家自然科学基金“抚育间伐调控黄土丘陵区刺槐人工林水分养分机理研究”（4177012305）
作者简介:刘愿(1994-),女,陕西榆林人,硕士研究生,研究方向:流域管理与水土保持。E-mail:liuyuanlydia@163.com
通讯作者:陈云明(1967-),男,陕西渭南人,研究员,博士生导师,研究方向:植被生态与水土保持。E-mail:ymchen@ms.iswc.ac.cn

更新日期/Last Update: 1900-01-01